fanxiang S660 2TB vs Western Digital WD Blue SN580 2TB
At least one of these has no price the site currently tracks, so what follows weighs specifications alone.
| Specification | fanxiangS660 2TB | Western DigitalWD Blue SN580 2TB |
|---|---|---|
| Capacity (GB) | 2000 | 2000 |
| Sequential read (MB/s) | 4800better | 4150 |
| Sequential write (MB/s) | 4300better | 4150 |
| Current best price | — | — |
| Price per TB | — | — |
| DRAM cache | — | No |
| NAND type | tlc | tlc |
| Controller | — | WD Polaris MP16+ |
How these two compare
Sequential throughput
fanxiang S660 2TB states 4800 MB/s read and 4300 MB/s write; Western Digital WD Blue SN580 2TB states 4150 MB/s read and 4150 MB/s write, both over PCIe. Sequential numbers like these describe large sustained transfers; the responsiveness you notice day to day tracks random access more closely than the peak figures do.
DRAM cache
On the cache question: the catalog does not state whether fanxiang S660 2TB carries a DRAM cache, and Western Digital WD Blue SN580 2TB is DRAM-less. The DRAM keeps the flash-translation table close, sparing a lookup on nearly every access; a drive without it leans on host memory or its own flash, which usually shows as slower sustained random writes rather than in the headline sequential numbers.
NAND, controller and warranty
On the flash itself: fanxiang S660 2TB uses TLC, and Western Digital WD Blue SN580 2TB uses TLC. NAND tiers count bits per cell — more bits pack more capacity into the same silicon but shorten write endurance and slow sustained writes, which is why QLC sits below TLC on lasting performance even when the sequential numbers match. Controller: fanxiang S660 2TB's controller is not stated and Western Digital WD Blue SN580 2TB uses the WD Polaris MP16+. The controller runs wear-levelling, error correction and the mapping table, so it shapes sustained and random behaviour as much as the flash does — though the model name alone predicts little without testing. fanxiang S660 2TB does not state one and Western Digital WD Blue SN580 2TB carries a 5-year warranty — the length the maker will stand behind the drive, and usually a proxy for the endurance it is rated to.
Which to buy
The site holds no current price for at least one of these, so it cannot call the buy on cost. Judge them on the specifications above — at the same capacity and interface, two drives usually part on things like the DRAM cache, the NAND tier, endurance and warranty, so weigh whichever of those the sections above report.
Common questions about this pair
- Which is faster, fanxiang S660 2TB or Western Digital WD Blue SN580 2TB?
- fanxiang S660 2TB states 4800 MB/s read and 4300 MB/s write; Western Digital WD Blue SN580 2TB states 4150 MB/s read and 4150 MB/s write, both over PCIe. Sequential numbers like these describe large sustained transfers; the responsiveness you notice day to day tracks random access more closely than the peak figures do.
- Should you buy fanxiang S660 2TB or Western Digital WD Blue SN580 2TB?
- The site holds no current price for at least one of these, so it cannot call the buy on cost. Judge them on the specifications above — at the same capacity and interface, two drives usually part on things like the DRAM cache, the NAND tier, endurance and warranty, so weigh whichever of those the sections above report.